1666106006664 has 256 divisors, whose sum is σ = 4810166415360. Its totient is φ = 476364672000.

The previous prime is 1666106006567. The next prime is 1666106006671. The reversal of 1666106006664 is 4666006016661.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42285517 + ... + 42324899.

It is an arithmetic number, because the mean of its divisors is an integer number (18789712560).

Almost surely, 2^{1666106006664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666106006664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405083207680).

1666106006664 is an abundant number, since it is smaller than the sum of its proper divisors (3144060408696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666106006664 is a wasteful number, since it uses less digits than its factorization.

1666106006664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39572 (or 39568 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 1666106006664 in words is "one trillion, six hundred sixty-six billion, one hundred six million, six thousand, six hundred sixty-four".